Ventilator.



No. 655,86l.

Patented Aug.- 14, I900. m. GAUL. VENTILATOR.

- (Application filad 56 t. 23 1899. (No Model.) p

A T701? NE Y9 m: mam: PETERS co, Moro-Mme. \VASHVNGTON, u c.

UNIT D STATES PATENT OFFICE;

MAX GAUL, OF FRANKFORT-ON-THE-MAIN,GERMANY.

VENTILATOR,

SPECIFICATION forming part of Letters Patent No. 655,861, dated August 14, 1900.. Application filed September 23, 1899- Serial No. 731,459. (No model.)

To aZZ whom it may concern;

Be it known that I, MAX GAUL, merchant, a subject of the Emperor of Germany, residing at Frankfort-on-the-Main, Sachsenhausen, 14 Oranachstrasse, in the Kingdom of Prussia and Empire of Germany, have invented certain newand useful Improvements in and Relating to Ventilators, of which the following is a full, clear, and exact description.

This invention has reference to improvements in and relating to ventilators; and my invention consists in a ventilator which is automatically actuated the moment a certain temperature is reached, the apparatus being such that it may be set to operate or actuate the ventilator at any desired temperature.

In the accompanying drawing my improved automatically-operated ventilator is shown adapted to a window.

In carrying my invention into practice I employ a thermostat, shown in the drawing as a thermometer Ct, which I provide with two (say) copper wires 12, one of said wires entering the bulb of the thermometer and the other wire being entered in the tube and at a point where the number indicates the temperature at which the thermometer is to operate. I also provide an electromagnet c, having a space or opening (1, into which a softiron rod 6 may enter. The ventilator consists of a disk or equivalent f, pivotally supported on a central spindle, which disk carries the rod 6 referred to, said rod, being of considerable weight, serving to normally retain the disk in the position shown.

The disk f is provided with, say, four apertures or openings g, and the window '2' is also provided with four apertures 7L, prefer- I ably slightly smaller than the apertures g,

the arrangement being such that normally the apertures 7b are closed by the solid parts of the disk f. If the temperature rises, then the mercury in the thermometer rises until it reaches the top wire I), and thereupon electrical connection is made. The wires 12 are connected to a battery or equivalent, the arrangement of the whole being such that when the mercury has risen, as described, and made electrical connection the electromagnet 0 draws the rod 6 into the opening (Z, and thus rotates the ventilator-disk to a sufficient extent, so that the openings of the Ventilatordisk and the openings in the window more or less coincide and the ventilator is opened. If the temperature and thereby the mercury fall, the electrical connection isbroken and the electromagnet is no longer active and releases the rod 6, and by the action of gravity thislatter descends into its original position, as shown, and the ventilator is again closed. The movement of the ventilator is preferably limited by pins or stops 70 Z.

7 What I claim, and desire to secure by Letters Patent, is-

In a ventilator, the combination with a thermostat of a rotatable disk ventilator, a solenoid arranged concentricthereto and a core carried by said disk arranged concentric to the periphery of said disk, substantially as described.

In witness whereof I subscribe my signature in presence of two witnesses.

MAX GAUL. WVitnesses:

JEAN GRUND, RICHARD GUENTHER. 

